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Finding the Fourth Proportional to 519,312.90, 778,892.55 and 145,373.70

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Solution

The fourth proportional to 519,312.90, 778,892.55 and 145,373.70 is: 218,039.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,312.90 : 778,892.55 = 145,373.70 : x
  2. Step 2: Convert to fraction form
    519,312.90/778,892.55 = 145,373.70/x
  3. Step 3: Cross multiply
    519,312.90x = 778,892.55 × 145,373.70
  4. Step 4: Simplify right side
    519,312.90x = 113,230,491,895.94
  5. Step 5: Solve for x
    x = 113,230,491,895.94/519,312.90
  6. Step 6: Final answer
    x = 218,039.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.